<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*css选择器*/
        p {
          color: red;
        }
        div>p{

        }
    </style>
</head>
<body>
    <div>
        <p>hello</p>
    </div>
</body>
</html>